Improved railway-switch



M. H. DOOLY'. RAILWAY SWITCH.

No. 73,700. Patented Jan. 28, 1868.-

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MARTIN HENRY DOOLY, *OF ATLANTA, GEORGIA.

Letters Patent No. 73,700, dated January 28, 1868.

IMPROVED RAILWAY-SWITGH.

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TO ALL WHOM IT MAY CONCERN:

Be it known that I, h'TARTIhT HENRSZDOOLY, of Atlanta, in the county of Fulton, andin the State of Georgia,

have invented certain new and useful Improvements in Railroad-Switches; and do hereby declare that the following is a full, clear, and exact description thereof, refereuce'being had to the accompanying drawings, and to the letters of reference marked thereon. I

In the annexed drawings, making part of this specification, A A A represent the rails of the main track of a railroad, and B B represent the switch-rails. These rails are constructed in any of the known and usual ways, and are spiked down in the usual manner to the cross-ties P P. The rails A A are not jointed to their contiguous rails of the main track, or to the switch-rails B B, upon the same tie, as is seen at m at, so that the jar will not only be broken, but more strength will be given to the rails at their joints. These rails A A are securely fastened to the cross-burs L and J, which said bars move with the rails as they are shifted for making connection with themain rails A, orthe switch-rails B B. A represents one of the main rails, which is eonnected to one of the switch-rails B, as represented. These rails lie against each other at one end, but separate, as a switch-rail must do, from a main rail toward their other ends. These rails A and B are secured to a bar, C, which lies beneath them at their connecting ends, and about six feet six inches from these connecting ends they are held rigidly at a suitable distance from each other by a. claznp, a. D represents an iron rod or shaft, about one and three-quarter inch in diameter, and about sixty-five feet in length. This'sha-ft lies parallel with and about three feet from thc main track, being supported upon cross-ties, which extend beyond the trails for that purpose, is kept in place by suitable loops or staples, and is provided with three cranks (2, cl, and d. Pitmen e and K connect the end cranks to the bars 0 and J, respectively. The main rail A, which lies next to shaft D, has secured to it, under its movable end, a bar, H, and this bar H is connected to crank d by means of a pitm'an, G. At I.therc are two signal-targets, one of which, standing in a vertical position, is stationary, while the other is pivoted to the stationary one a little below its centre, and has its lower end connected in any suitable manner to one of the rails A. When the rails A stand in line with their contiguous rails, A, of the main track, these signal-targets stand side by side, but when the rails A are shifted into connection with the switch-rails B B, the targets are separated at their upper ends, thus indicating to the approaching train the position of the rails. The shaft D is provided with a lever-handle, M, by means of which it is partially revolved backwards and forwards. By a partial revolution of the shaft D, therails of this switch are changed simultaneously, so as to make connection with the main or the side track, as may be desirable. Suppose the rails A A and A connect with the rails A for forming the main track, and it is desirable to open the switch, by turning the shaft D half round, by means of its handle,.the rails Aare shifted so that they connect with the switchrails B 13, while at the same time the switch-rail B is'madc to connect with its contiguous switch-rail B. A train may'now run from the main to the side track, or from the side to the main track. By turning the shaft D back again, half around, the rails of the main track are thrown in connection.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is- The elongated crank-shaft D, connecting'with the sliding bars Jand G by the pitmcn c and K, in combination with the rails A, A, A, and B, and the target-signals, whereby the switch-rails and signals are shifted simultaneously, and the ordinary frogs dispensed with, substantially as specified. I

In testimony that I claim the foregoing, I have hereunto set my hand, this 36. day of December, 1867.

MARTIN HENRY DOOLY.

Witnesses: v

V. D; Srocxnmneu, A. H. Mann, 

